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2004 ?? ????? ??? ?? Shanghai digital manufacturing co., Ltd. ??? ????????? ?? ?????????? ???????? ???? ????? ???-???????? ??????????? ?? ??? ????? ???? ???????? ???????? ???????? ??????? ???????????. ????? ???????? ??????? ??????????, ???????? ????????? ?? ??????? ??? ????????? ????? r & d ????????? ?? ???????? ????? ??????? ???????? ??????? ??????? ?????. ?????? ????????? ?????? ?? zhicheng ??????? ?????????, pudong new area ?? ?????? ??? ???, chongqing, tianjin, ningbo, xiangtan ?? ????? ??????? ???? ?? ??????? ??.

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1968 ?????????? ??????? ?????? ????? xiangtan ?? ??? ???? ??? ????????? lu bingheng ???? ????????? ??? xi 'an jiaotong ????? ???????????? ?????? ???????? ??? ??????. ??? xi 'an jiaotong ????? ?????????? ?? jilin ????? ?????????? ??????? ?????? ??????????? ??? ???? ?? ??? ???, ????? ?????? ?????? jiaotong ????? ?????????? ????? ?????????????? ??? ???? ?? ??. ??? ????? ???????? ???????? ?? ???????? ??????????? ?????? ??????? ?? ????????? ????????????.

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